TY  - GEN
AU  -  De Vellis, Robert F
TI  - Scale development: theory and applications
T2  - 26 applied social research methods series
SN  - 9781412980449
PY  - 2012///
CY  - Los Angeles
PB  - Sage
KW  - Scaling - social science
KW  - Reliability
KW  - Validity
ER  -